usedtobedone与beusedtodo都可以表被动吗意思一样吗

used to be done表示过去经常被做， be used to do 表示被用来做，都有被动的意思，但被动所处的位置不一样。例如： Many in-home jobs that used to be done primarily by women are now also done by men. （过去很多以妇女为主做的家务现在男子也做）。

Knives are used to cut.(刀子是用来切东西的）

Used to be done和be used to do都表示被动，意思不一样。

Used to be done，表示"过去常常被..."

Be used to do表示"被用来干..."

The grandpa used to be taken good care of by his grandson.

Pains are used to write on paper with.

Computers can be used to do many things.

The big house is used to store much good.